Real Estate - Fair Value of Assets Acquired and Liabilities Assumed Based Upon Purchase Price Allocation (Details) - USD ($)	Nov. 21, 2019	Oct. 01, 2019	Jan. 10, 2019	Dec. 27, 2018	Mar. 14, 2018
Park Ten Place and Timberway
Assets acquired:
Real estate assets	$ 20,090,000
Total assets	20,090,000
Liabilities assumed:
Real estate property taxes	(505,908)
Escrow-TI-LC	(406,274)
Prepaid rents	(45,504)
Security deposits	(196,284)
Total liabilities assumed	(1,153,970)
Fair value of net assets acquired	$ 18,936,030
1400 Broadfield, 16420 Park Ten and 7915 FM 1960
Assets acquired:
Real estate assets		$ 21,063,750
Total assets		21,063,750
Liabilities assumed:
Real estate property taxes		(459,648)
Prepaid rents		(17,149)
Security deposits		(285,423)
Total liabilities assumed		(762,220)
Fair value of net assets acquired		$ 20,301,530
11211 Katy Freeway
Assets acquired:
Real estate assets			$ 4,494,536
Total assets			4,494,536
Liabilities assumed:
Prepaid rents			(15,966)
Security deposits			(53,459)
Total liabilities assumed			(69,425)
Fair value of net assets acquired			$ 4,425,111
Richardson Tech
Assets acquired:
Real estate assets					$ 5,166,000
Total assets					5,166,000
Liabilities assumed:
Security deposits					(45,650)
Total liabilities assumed					(45,650)
Fair value of net assets acquired					$ 5,120,350
Spectrum Building
Assets acquired:
Real estate assets				$ 16,950,938
Total assets				16,950,938
Liabilities assumed:
Accounts payable and accrued expenses				(194,826)
Security deposits				(26,209)
Total liabilities assumed				(221,035)
Fair value of net assets acquired				$ 16,729,903